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Finding the Fourth Proportional to 28,046.79, 42,069.78 and 8,338.68

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Solution

The fourth proportional to 28,046.79, 42,069.78 and 8,338.68 is: 12,507.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,046.79 : 42,069.78 = 8,338.68 : x
  2. Step 2: Convert to fraction form
    28,046.79/42,069.78 = 8,338.68/x
  3. Step 3: Cross multiply
    28,046.79x = 42,069.78 × 8,338.68
  4. Step 4: Simplify right side
    28,046.79x = 350,806,433.09
  5. Step 5: Solve for x
    x = 350,806,433.09/28,046.79
  6. Step 6: Final answer
    x = 12,507.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.